78302808 has 64 divisors (see below), whose sum is σ = 218988000. Its totient is φ = 25923456.

The previous prime is 78302803. The next prime is 78302827. The reversal of 78302808 is 80820387.

It is a super-2 number, since 2×78302808² = 12262659481369728, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78302803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32758 + ... + 35066.

Almost surely, 2^78302808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78302808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109494000).

78302808 is an abundant number, since it is smaller than the sum of its proper divisors (140685192).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78302808 is a wasteful number, since it uses less digits than its factorization.

78302808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2481 (or 2471 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 78302808 is about 8848.8873876889. The cubic root of 78302808 is about 427.8180581674.

The spelling of 78302808 in words is "seventy-eight million, three hundred two thousand, eight hundred eight".